TABLE 1.

L. monocytogenes strains and associated characteristics

Samplea	Sourceb	Serotype	Clusterc	MAMAd
E1163	WADOH	1/2a	IIa	2
E1165	WADOH	1/2a	IIa	2
E841	WADOH	1/2a	IIa	2
H1157	WADOH	1/2a	IIa	2
M32771C	USDA	1/2a	IIa	2
M34058E	USDA	1/2a	IIa	2
M36046A	USDA	1/2a	IIa	2
M36509A	USDA	1/2a	IIa	2
M36582B	USDA	1/2a	IIa	2
M37952A	USDA	1/2a	IIa	2
H1166	WADOH	1/2a	IIb	2
M35568A	USDA	1/2a	IIb	2
M32490G	USDA	1/2a	IIb	2
M32490E	USDA	1/2a	IIb	2
M35568E	USDA	1/2a	IIb	2
M37010C	USDA	1/2a	IIb	2
E750	WADOH	1/2a	IIIc	2
H1162	WADOH	1/2a	IIIc	2
H1445	WADOH	1/2a	IIIc	2
M10867C	USDA	1/2a	IIIc	2
M12716E	USDA	1/2a	IIIc	2
F15C18	FDA	1/2b	Ia	1
F2492	FDA	1/2b	Ia	1
H1159	WADOH	1/2b	Ia	1
H1164	WADOH	1/2b	Ia	1
E9900101	WADOH	1/2b	Ib	1
H9900104	WADOH	1/2b	Ib	1
EH9066	CDC	1/2c	IIc	2
EH9067	CDC	1/2c	IIc	2
F3321	CDC	1/2c	IIc	2
H7973	CDC	1/2c	IIc	2
H900096	WADOH	1/2c	IIc	2
H9333	CDC	1/2c	IIc	2
M35584	USDA	4c	Ib	3
M36467A	USDA	4c	Ib	3
M35402A	USDA	4b	Ib	1
V013668A	USDA	4b	Ib	1
H2365	CDC	4b	Ic	1
H1161	WADOH	4b	Ic	1
H1329	USDA	4b	Ic	1
H2172	USDA	4b	Ic	1
H9900094	WADOH	4b	Ic	1
M11056A	USDA	4b	Ic	1
M13565A	USDA	4b	Ic	1
M33027A	USDA	4b	Ic	1
H5070	CDC	4b	Id	1
V8807	USDA	4b	Id	1
H2150	WADOH	4b	Id	1
H1092	CDC	4b	Id	1
H2140	USDA	4b	Id	1

^aSample identification prefix indicates where the strain was originally isolated: E, environment; H, human; M, bulk milk; and V, veterinary.

^bUSDA, U.S. Department of Agriculture, Pullman, Wash.; WADOH, Washington State Department of Health, Shoreline; CDC, Centers for Disease Control and Prevention, Atlanta, Ga.; FDA, Food and Drug Administration.

^cCluster shows the position of the isolate within the dendrogram (Fig. 1). Prefixes I and II correspond to those delineated in Piffaretti et al. (27).

^dMAMA-PCR results (21): 1, Division I; 2, Division II (27); 3, serotype 4c.